66642707010533 has 4 divisors (see below), whose sum is σ = 66647849604480. Its totient is φ = 66637564416588.

The previous prime is 66642707010527. The next prime is 66642707010541. The reversal of 66642707010533 is 33501070724666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66642707010533 - 2⁴⁰ = 65543195382757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66642707010133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2571277535 + ... + 2571303452.

It is an arithmetic number, because the mean of its divisors is an integer number (16661962401120).

Almost surely, 2^{66642707010533} is an apocalyptic number.

It is an amenable number.

66642707010533 is a deficient number, since it is larger than the sum of its proper divisors (5142593947).

66642707010533 is a wasteful number, since it uses less digits than its factorization.

66642707010533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5142593946.

The product of its (nonzero) digits is 3810240, while the sum is 50.

The spelling of 66642707010533 in words is "sixty-six trillion, six hundred forty-two billion, seven hundred seven million, ten thousand, five hundred thirty-three".